There’s something oddly satisfying about fixing the smallest detail on your car. A burnt-out number plate bulb might seem trivial—barely noticeable during the day—but at night? It’s like a missing tooth in an otherwise perfect smile. And if you’ve got a Peugeot 308, you already know this car thrives on details.

In this guide, we’re diving deep into Peugeot 308 number plate bulb replacement—not just the how, but the why, the common mistakes, the bulb types across generations, and how to avoid warning lights afterward. We’ll walk through it like we’re in the driveway together, tools in hand, tailgate open.

Ready? Let’s get started.

Why Your Peugeot 308 Number Plate Bulb Matters More Than You Think

It’s easy to ignore that tiny light above the rear plate. But legally—and practically—it matters.

• It keeps your registration visible at night.
• It helps avoid fines.
• It maintains the clean, premium look of your 308.
• It prevents MOT or roadworthiness test failures.

And honestly? Driving around with one dark corner just feels unfinished.

Understanding the Peugeot 308 Generations

Before we grab tools, let’s clarify something important: not all 308s are built the same.

First Generation (T7: 2007–2013)

The early models typically use W5W (501) halogen bulbs housed in small rectangular units.

Second Generation (T9: 2013–2021)

Some trims switched to LED modules rather than replaceable bulbs.

Third Generation (P5: 2021–Present)

Most modern models use integrated LED units, meaning full module replacement is required.

Knowing your generation saves time—and frustration.

Symptoms of a Faulty Number Plate Bulb

You might notice:

• One side dimmer than the other
• Complete darkness on one side
• Dashboard warning (bulb failure message)
• Intermittent flickering

If it’s flickering, that’s often a loose contact or corrosion. If it’s dead? Time to replace.

Tools You’ll Need

We love a quick win. Thankfully, this job requires minimal gear:

• Small flathead screwdriver
• Plastic trim removal tool (optional but safer)
• Replacement bulb or LED module
• Gloves (to avoid grease on halogen bulbs)

That’s it. No jacks. No ramps. No swearing—hopefully.

Choosing the Correct Bulb Type

For Halogen Models

Most Peugeot 308 T7 and early T9 models use:

• W5W / 501
• 12V, 5W

For LED Models

Later trims use:

• Integrated LED housing
• CANbus-compatible units recommended

Why CANbus? Because Peugeot electrical systems are picky. Non-compatible LEDs may trigger warnings.

Step-by-Step: Peugeot 308 T7 Number Plate Bulb Replacement

Let’s break it down clearly.

1. Open the Boot

Simple. Access the rear plate housing from outside.

2. Locate the Light Unit

You’ll see small plastic housings above the plate.

3. Remove the Housing

Insert a flathead gently into the side slot.
Pry carefully. Don’t force it.

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4. Twist the Bulb Holder

Quarter-turn anti-clockwise.

5. Replace the Bulb

Pull out old W5W.
Push in new one.

6. Test Before Reinstalling

Turn on sidelights.
If it lights up—perfect.
If not, flip the bulb (polarity matters sometimes).

7. Refit Housing

Click back into place securely.

Done in under 10 minutes.

Replacing LED Modules on T9 & P5 Models

LED modules differ slightly.

Removal Steps

• Insert trim tool at housing edge.
• Carefully unclip module.
• Disconnect wiring plug.
• Connect new module.
• Test before snapping back.

If replacing both sides, do one at a time. It prevents confusion with connectors.

Common Mistakes We Should Avoid

We’ve all rushed small jobs. But here’s what causes headaches:

• Forcing the housing and breaking clips
• Installing non-CANbus LEDs
• Touching halogen glass with bare hands
• Not testing before reassembly

Take your time. It’s a 5-minute job—don’t turn it into a 30-minute repair.

Why LED Upgrades Are Popular

Many 308 owners upgrade halogen to LED.

Benefits:

• Brighter, whiter light
• Modern appearance
• Longer lifespan
• Lower energy draw

But here’s the catch: buy quality LEDs. Cheap ones flicker or fail quickly.

What If the New Bulb Still Doesn’t Work?

Let’s troubleshoot logically.

Check the Fuse

Number plate lights usually share a fuse with tail lights.

Inspect the Wiring

Look for:

• Corrosion
• Broken wires
• Water ingress

Check the Connector Pins

Clean gently if oxidized.

If both sides fail? It’s unlikely both bulbs died simultaneously.

How Long Does a Peugeot 308 Number Plate Bulb Last?

Halogen:

• 3–5 years average

LED:

• 8–10 years typical lifespan

Environmental factors matter. Heavy rain, car washes, and salted roads shorten life.

Estimated Replacement Cost

Let’s compare DIY vs garage.

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DIY Cost

• Halogen bulb: $2–$5
• LED module: $10–$30

Garage Cost

• Labor + bulb: $40–$80

It’s one of the easiest ways to save money.

Legal Considerations

In most countries:

• Both plate lights must function
• Light must be white
• Plate must be clearly readable

Driving without working plate illumination can result in fines or inspection failure.

Small bulb. Big consequences.

Is It Different for the Peugeot 308 SW or GTI?

No major difference.

The Peugeot 308 SW (estate) and GTI versions use similar housings depending on generation.

Always confirm:

• Model year
• Trim level
• Halogen vs LED setup

When Should We Replace Both Bulbs?

If one has failed, the other isn’t far behind.

Think of them like headlights—replace in pairs for:

• Even brightness
• Consistent lifespan
• Balanced appearance

Preventative Maintenance Tips

• Avoid pressure washers directly on housing
• Check during regular service
• Clean housing during bulb replacement
• Apply dielectric grease lightly to contacts

Tiny effort. Long-term reliability.

Quick Reference: Replacement Summary Table

Why This DIY Job Feels So Rewarding

We fix big things for necessity.
We fix small things for pride.

Replacing your Peugeot 308 number plate bulb is one of those small wins that quietly restores your car’s completeness. It’s quick. It’s affordable. And it keeps your 308 looking sharp at night.

Sometimes, the smallest light makes the biggest difference.

Conclusion

The Peugeot 308 number plate bulb replacement is one of the simplest maintenance tasks we can perform ourselves. Whether you’re driving a T7, T9, or the latest P5 model, the process remains straightforward—identify your bulb type, remove carefully, replace correctly, and test before refitting.

By understanding the generation differences and choosing quality parts, we avoid dashboard warnings, broken clips, and unnecessary garage bills. It’s a perfect example of smart DIY ownership: minimal cost, maximum satisfaction.

Now that you know how easy it is, why wait? That tiny glow above your plate deserves attention.

FAQs

1. What bulb does a Peugeot 308 number plate use?

Most early models use a W5W (501) 12V bulb. Later models may use integrated LED modules.

2. Can I upgrade to LED on my Peugeot 308?

Yes, but ensure the LED is CANbus-compatible to avoid warning lights.

3. Why does my number plate light flicker?

Usually loose connection, poor-quality LED, or corroded contacts.

4. Is it illegal to drive with one plate light out?

In many regions, yes. Both lights must function for full compliance.

5. How long does replacement take?

Typically 5–10 minutes for halogen, slightly longer for LED modules.

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